TLS Online TPP Program

#Question id: 12315


In the evolution of whelk- eating behavior in crows, which of the following did natural selection minimize? 

#Unit 10. Ecological Principles
  1. The average number of drops required to break the shell
  2. The average height a bird flew to drop a shell
  3. The average total energy used to break shells
  4. The average size of the shells dropped by the birds